Improved ratchet-drill



dnitrd (gitarre GEORGE HUT'CHINS,

OF NEW YORK, N. Y.

Letters .Patent No. 90,547, dated May 25, 1869.

IMPROVED RATCHET-DRILL.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom tt may concern:

Be it known that I, GEORGE HU'roHINs, of the city, county, and State of New York, have invented a new and useful Improvement in Ratchet-Drills; and I do hereby`decl'are the following to be a suiiiciently clear and exact description of the same, that any one skilled in sueh matters may construct and use the same.

Figure 1 is a side elevation of the drill, one of the wheels being left olf, to show the connection of the lever with the stock.

' Figure 2 is an elevation, at right angles to iig. l, and on the side where the ratchet-lever is operated.

ALike letters refer to like parts in both views.

The nature of my invention consists in combining and arranging the several devices which compose my drill, in the manner hereinafter set forth.

A is the stock, or mandrel, formed of metal, with a square hole in one end, to receive the drill in the ordinary style, and at the other end is attached the feed-screw B, so arranged as to be capable of being turned by hand, or a wrench, as desired.

Between said screw and the drill-socket a sleeve, O, is fitted upon the mandrel, and held from moving endwise by a pinion, D, which is fastened upon the mandrel, and a colla-r, E, also fastened at the opposite end of said sleeve.

Upon said sleeve, near its'oent-re and opposite sides, are formed the pins, or studs, which serve as pivots to the ratchet-lever L, said lever being made intwo parts at its pivoted end, to be conveniently fitted upon said pins, or studs.

Near the forked end of said lever are fitted, in mortises, the pawls P P', or teeth, which take hold in the ratehets, said ratehets being formed or cast upon the drivingwheels W W'.

These pawls are forced outward by a spring, or springs, concealed in the lever L, near its fork.

This lever may be of any required length, to give the requisite power for operating the drill and its working-parts.

The two driving wheels have their bearings also upon the studs to which the lever L is pivoted; consequently the lever will always correspond to the radii of the Wheels, and as the ratchet, or teeth upon the inner faces of said wheel are'both east from the same pattern, but placed upon the opposite sides of the lever, or drill-stock, it will be seen that their bevelled edges are reversed to each other; consequently,by moving the lever to one extreme point of its throw, one wheel will be engaged by the paw] l? or P', and will thereby give motion to the pinion D.

SQ, also, as the level' L is moved to the opposite extreme, the opposite pawl is engaged, but being on `the opposite side of said pinion, it still continues its motion, and thus the reoiproeation of the lever gives a continuons forward motion to the stoek and drill.

In place of the coil-spring inserted between the two pawls P P', a flat spring or two may be inserted in the lever, where-its arms are joined together, to form the fork, and a greater' length of bearing may thereby be obtained for the pawls.

Having thus brieliy described my invention,

What I claim, and desire to secure by Letters Patent, is

rlhe arrangement herein described of the spring pawls P P', in'the bifuroated handle L, at right angles to its longitudinal axis, and the combination of those parts, so arranged with the toothed inner surface of the gear-wheels W W', and with the sleeve C, as and for the `purpose set forth.

GEORGE HUTOHIN S.

Witnesses WILLLAM SHEDLOCK, P. L. SLAYTON. 

